juno 60

Roland Juno-60

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Roland was one of the main pacemakers in analogue synthesis, also competing

with the Sequential and Oberheim products. They did anticipate the moving

market and produced the Juno-6 relatively early. This was one of the first

accessible synths, having a reasonably fat analogue sound without the price

card of the monster predecessors. It brought synthesis to the mass market that

marked the decline of Sequential Circuits and Oberheim who continued to make

their products bigger and fatter. The reduced price tag meant it had a slightly

thinner sound, and a chorus was added to extend this, to be a little more

comparable.

The synth again follows the Mini Moog design of oscillators into filter into

amp. The single oscillator is fattened out with harmonics and pulse width

modulation. There is only one envelope generator that can apply to both the

filter and amplifier.

Control:

DCO: Amount of pitch wheel that is applied to the oscillators frequency.

VCF: Amount of pitch wheel that is applied to the filter frequency.

Tune: Master tuning of instrument

Glide: length of portamento

LFO: Manual control for start of LFO operation.

Hold: (*)

Transpose: Up/Down one octave

Hold: prevent key off events

LFO:

Rate: Frequency of LFO

Delay: Period before LFO is activated

Man/Auto: Manual or Automatic cut in of LFO

DCO:

LFO: Amount of LFO affecting frequency. Affected by mod wheel.

PWM: Amount of LFO affecting PWM. Affected by mod wheel.

ENV/LFO/MANUAL: Modulator for PWM

Waveform:

Pulse or Ramp wave. Pulse has PWM capabily.

Sub oscillator:

On/Off first fundamental square wave.

Sub:

Mixer for fundamental

Noise:

Mixer of white noise source.

HPF: High Pass Filter

Freq:

Frequency of cutoff.

VCF:

Freq:

Cutoff frequency

Res:

Resonance/emphasis.

Envelope:

+ve/-ve application

Env:

Amount of contour applied to cutoff

LFO:

Depth of LFO modulation applied.

KBD:

Amount of key tracking applied.

VCA:

Env/Gate:

Contour is either gated or modulated by ADSR

Level:

Overall volume

ADSR:

Attack

Decay

Sustain

Release

Chorus:

8 Selectable levels of Dimension-D type helicopter flanger.

* The original instrument had a basic sequencer on board for arpeggio effects

on each key. In fact, so did the Prophet-10 and Oberheims. This was only

implemented in 0.10.11.

The LFO cut in and gain is adjusted by a timer and envelope that it triggers.

The Juno would improve from the use of the prophet DCO rather than its own one.

It would require a second oscillator for the sub frequency, but the prophet DCO

can do all the Juno does with better resampling and PWM generation.